Butcher s saw



(his Model.)

WITNESSES.

Unites rains GEORGE NUSSER, or HOBOKEN, NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 617,178, dated January 3', 1899.

, Improvements in Butchers Saws, of which the following is a specification.

This invention relates to improvements in butchers saws by which the blade can bereadily removed from the saw-frame,so as to permit the insertiomof a new blade with sharp teeth whenever required, so that the sawis always in good working order; and the invention consists inthe combination,in a butchcrs saw, with the saw-frame having ahandle and a transverse pin at its inner end and a recess in its outer end, of a saw-blade having transverse pins at its inner and outer ends, the transverse pin at the outer end engaging the recess of the saw-frame, a link provided at one end with a hook for engaging the inner pin of the saw-blade, said link being bifurcated and slotted at its opposite end, whereby said link is guided on the pin at the inner end of the saw-frame, and acam-lever pivoted to said bifurcated end and abutting against the inner end of the saw-frame, as will be fully described hereinafter, and finally pointed out in the claim.

"In the accompanying drawings, Figure 1 represents a side elevation of my improved butchers saw. Fig. 2 is a detail side elevation ofthe mechanism for locking the sawblade to the frame of the saw. Fig. 3 is a detail horizontal section on line 3 3, Fig, 2-,

Fig. 4 is avertical transverse section on line I 4; 4, Fig. 2, and Fig. o is a side elevation of the locking mechanism of the blade, shown in open position for permitting the removal of the blade from the frame.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the saw-frame of my improved butchers saw; B, the handle, which is attached to one end of the saw-frame, and C the detachable sawblade. The saw-blade t] is provided with transverse pins 0 c at'its ends, one of which is engaged by the outerrecessed end a of the saw-frameigr ile the other pin 0' is engaged by the hook s 'naped bifurcated end it of a connecting-link, the sides D Dof the oppo n mation filed September 22,1898. Serial No. 691,596. on an.)

H site bifurcated end of said link passing at each side of the inner end at ofthe saw-frame. The link sides D D are each provided with a transverse slot (1 by. which the link is guided on the transverse pin 6' at the inner end of the saw-frame. The slot and pin serve thus toretain the link on the inner end of the sawframe and at the same time guide the link lengthwise in the proper direction when tight: ening the saw. The link is provided with projecting portions or earsd d'-,to"which is pivoted by the pin (1- the cam-lever E between the link sides D D, and'the camdever is provided with an eye-shaped handle e, by which "'thecaifi 'levercan betafli errdfrold'of in releas ingorlocking the saw-blade. When the camlever E is moved into the position shown in Fig. 2 until it abuts against the inclined side of the inner enda' of the saw-,frame, it will pull the link back and produce thereby the tight stretching and locking of the saw-blade between the outer end a OfthesaW-frame and the link. When the cam-lever E is moved into unlocked position, as shown in Fig. 5, the link is permitted to move forward, so that the hook portion h of the same is released from the saw-blade, so that the blade may be removed from the frame. Thisform of com nection permits a short cam-lever, so that the whole device is compact and a full-sized sawhandle may be used through which all four fingers of the hand may be passed.

The advantages of my improved butchers saw are that as soon as the blade becomes dull it can be takenout of the supportingframe and a new blade with sharp teeth be inserted, so that the dull blade can be sharpened in the meantime, several blades being furnished with each saw-frame. In this way the butcher has a sharp saw available at all times without waitingfor the resharpenin g of the blade; The locking and unlockingdevice is operated with great facility, so that the insertion and removal of the blade are accomplished quickly and easily and therebya more efiective saw for-butchers? use obtained.

Having thus described my invention, I

claim as new and desire to secure by Letters;

Paton a In a butchers saw, the combination, with a saw-frame having a handle and a transverse pin at its inner end, and a'rccess initsouter end, of a saw-blade having transverse pins at end and abutting against the inner end of the 10 saw-frame, substantially as set forth.

its-inner and outer ends, the transverse pin at the outer end engaging the recess. of the saw frame, a link provided at one end with a hook for engaging the inner pin Of the sawblade, said link being bifurcated and slotted" at its opposite end whereby said link is guided on the pin at the inner end 'of the saw-frame,

'andacam-lever piveted to said bifurcated In testimony that I claim the foregoing as my invention I have signed my name in presenee of two subscribing witnesses.

' GEORGJEI NUSSER. Witnesses: 7

PAUL GOEPEL, M. HENRY WURTZEL. 

